TY - JOUR AU - Skvortsova, Aleksandrina AU - Cohen Rodrigues, Talia AU - de Buisonjé， David AU - Kowatsch, Tobias AU - Santhanam, Prabhakaran AU - Veldhuijzen, Dieuwke S AU - van Middendorp, Henriët AU - Evers, Andrea PY - 2022 DA - 2022/3/1 TI -用积极的建议提高身体活动智能手机干预的有效性:随机对照试验JO - J Med Internet Res SP - e32130 VL - 24 IS - 3kw - eHealth KW -移动健康KW -体力活动KW -步行KW -积极建议KW -结果预期KW -手机AB -背景:电子健康干预有可能增加用户的体力活动。然而，它们的效果各不相同，通常只有短期效果。提高其有效性的一种可能的方法是通过给予用户关于干预有效性的积极建议来增加用户的积极结果预期。研究表明，当个体对各种类型的干预有积极的期望时，他们往往会从这些干预中受益更多。目的:这项基于网络的研究的主要目的是调查积极的建议是否可以改变参与者对智能手机身体活动干预有效性的期望，并随后增加参与者在干预期间采取的步数。此外，我们还研究了建议是否会影响应用程序的感知有效性、应用程序的参与度、参与者自我报告的活力和疲劳程度。方法:这项研究涉及21天的全自动身体活动干预，旨在帮助参与者多走几步。干预是通过一个基于智能手机的应用程序进行的，该应用程序向参与者提供特定的任务(例如，设定活动目标或寻求社会支持)，并记录他们每天的步数。参与者被随机分为积极建议组(69/133,51.9%)和对照组(64/133,48.1%)。 Positive suggestions emphasizing the effectiveness of the intervention were implemented in a web-based flyer sent to the participants before the intervention. Suggestions were repeated on days 8 and 15 of the intervention via the app. Results: Participants significantly increased their daily step count from baseline compared with 21 days of the intervention (t107=−8.62; P<.001) regardless of the suggestions. Participants in the positive suggestions group had more positive expectations regarding the app (B=−1.61, SE 0.47; P<.001) and higher expected engagement with the app (B=3.80, SE 0.63; P<.001) than the participants in the control group. No effects of suggestions on the step count (B=−22.05, SE 334.90; P=.95), perceived effectiveness of the app (B=0.78, SE 0.69; P=.26), engagement with the app (B=0.78, SE 0.75; P=.29), and vitality (B=0.01, SE 0.11; P=.95) were found. Positive suggestions decreased the fatigue of the participants during the 3 weeks of the intervention (B=0.11, SE 0.02; P<.001). Conclusions: Although the suggestions did not affect the number of daily steps, they increased the positive expectations of the participants and decreased their fatigue. These results indicate that adding positive suggestions to eHealth physical activity interventions might be a promising way of influencing subjective but not objective outcomes of interventions. Future research should focus on finding ways of strengthening the suggestions, as they have the potential to boost the effectiveness of eHealth interventions. Trial Registration: Open Science Framework 10.17605/OSF.IO/CWJES; https://osf.io/cwjes SN - 1438-8871 UR - //www.mybigtv.com/2022/3/e32130 UR - https://doi.org/10.2196/32130 UR - http://www.ncbi.nlm.nih.gov/pubmed/35230245 DO - 10.2196/32130 ID - info:doi/10.2196/32130 ER -